Improvement in screw-drivers



1. A. wAKEFlELD.

Screw-Drivers.

No.l52,198. Patented1une15,1g74.

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l @www BY 4 K UNITED STATES PATENT OFFICE,

JAMES A. WIAKEFIELD, OF MINNEAPOLIS, MINNESOTA.

IMPROVEMENT IN SCREW-DRIVERS.

Specification forming part of Letters Patent No. 152,198, dated June 16,1874; application filed May 1, 1874.

To all whom it may concern Be it known that I, J AMES A. VAKEFIELD, ofMinneapolis, in the county of Hennepin and State of Minnesota, haveinvented a new and useful Improvement in Screw-Drivers, of which thefollowing is a specification:

This invention relates to a new and useful improvement in tools of everyday-use; and consists of a combination of a screw-driver and one or morecountersinks or other similar tools, the construction being ashereinafter described.

In the accompal'lying drawing, Figure 1 represents the tool as when usedfor a screwdriver, the countersinks being turned up out ofthe way. Fig.2 shows it as when the countersnk is ready for use.

Similar letters of reference indicate corresponding parts.

A is the screw-driver. B and C are two countersinks, one for iron a-ndone for wood.

Inthis example of my invention, the screwdriver is arranged to be usedin a brace; but it may have a handle, and be used as a common handscrew-driver, the countersinks being arranged and used as shown. Thesecountersinks are identical in form and construction, with the exceptionof' the cutting ends, one, B, being made for iron, and the other one, O,for wood.

The middle ot' the screw-driver is enlarged, a projection, D, being ontwo opposite sides, which projections are slotted longitudinally,through each of which slots is a pin, E. F represents a longitudinalslot in each of the countcrsinks. The pins E pass through these slots,and conne the countersinks to the screwdriver, and allow them to slidelengthwise.

Vhen the screw-driver is in use, the countersink's are drawn back towardthe brace, as seen in the drawing, with the backs in contact with thescrew-driver. When a countersink is required, it is turned on thepivot-pin E, as on a hinge, to the position seen in Fig. 2.

G is a small slit in the back ot' the head of each countersink, whichreceives the end ot' the screw-driver, as seen at H. The faces ot' thecountersink are fitted tothe sides of the screw-driver, and thescrew-driver turns the countersink as it would turn a wood-screw.

rlhis is a very convenient arrangement, and saves much time andannoyance in hunting up the proper tools and adjusting them in thebrace.

It is obvious that other tools than countersinks may be connected withthe screw-driver and operated in the same manner. I do not, therefore,confine myself exclusively to countersinks, but design the implement toembrace all tools which may be made to operate in the manner described.i

Having thus described my invention, I claim as new and desire to secureby Letters Patent- 1. One or more countersinks or other tools, incombination with a screw-driver, constructed and arranged to operatesubstantially as herein shown anddescribed.

2. The projection D and pin E, in combination with a screw-driver,substantially as and for the purposes described.

JAMES A. WA KEFIELD.

Vitnesses C. J. BARTLnsoN, ALBERT SMrrH.

